ID 2.3.2.12 DE peptidyltransferase. CA peptidyl-tRNA1 + aminoacyl-tRNA2 = tRNA1 + peptidyl(aminoacyl-tRNA2). CC -!- The enzyme is a ribozyme. CC -!- Two non-equivlant ribonucleoprotein subunits operate in non-concerted CC fashion in peptide elongation. CC -!- The small subunit forms the mRNA-binding machinery and decoding CC center, the large subunit performs the main ribosomal catalytic CC function in the peptidyl-transferase center. //